Effect of high gamma radiation dosage and elevated temperature on the mechanical performance of sustainable alkali-activated composite as a cleaner product
| Autor: | Alaa Mohsen, Mohamed A. Ramadan, M.S. Amin, S.A. Waly |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Composite number 0211 other engineering and technologies Slag 02 engineering and technology Building and Construction Radiation 021001 nanoscience & nanotechnology Microstructure Electrical resistivity and conductivity visual_art Phase (matter) 021105 building & construction visual_art.visual_art_medium General Materials Science Cementitious Composite material Fourier transform infrared spectroscopy 0210 nano-technology |
| Zdroj: | Cement and Concrete Composites. 121:104087 |
| ISSN: | 0958-9465 |
| DOI: | 10.1016/j.cemconcomp.2021.104087 |
| Popis: | This study aims to prepare novel and eco-sustainable alkali-activated cementitious products that resist fire and harmful radiation. The blends were prepared from partial replacement of slag with 0%, 10%, 20% and 30 wt% lead-rich sludge (LRS) followed by activation with 3% NaOH. The physico-mechanical properties as well as fire and radiation resistivity of the hardened composites were assessed. XRD, TGA/DTGA, FTIR and SEM/EDX analyses were adopted to explore the phase architecture and microstructure of various specimens. Superior mechanical performance was displayed by the composite accommodating 20% LRS; however, reasonable mechanical performance was delivered by the composite accommodating 30% LRS. The composite containing 30% LRS exhibited the greatest fire resistivity at 1000 °C. Impressive gamma-radiation resistivity was attained by the composite accommodating 10% LRS. SEM images affirmed the establishment of compacted/cross-linked microstructures for specimens exposed to a temperature of 250 °C or gamma ray irradiation at 2000 kGy. The proposed composites are recommended for secure utilization in the construction field. |
| Databáze: | OpenAIRE |
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